BIOLOGY AND ACTIVITY OF Diaeretiella rapae (McIntosh) – AN ENDO-PARASITOID OF APHIDS INFESTING CRUCIFEROUS CROPS
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Date
2013
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Anand Agricultural University, Anand
Abstract
Investigations on biology and activity of Diaeretiella rapae
(McIntosh) an endo parasitoid of aphids infesting cruciferous crops
were carried out at Biological Control Research Laboratory as well as
Agronomy farm of B. A. College of Agriculture, Anand Agricultural
University, Anand (Gujarat) during 2011-12 and 2012-13. Studies on
biology of D. rapae revealed that the egg to pupal period ranged from 8
to 10 days with an average of 8.83 ± 0.83 days. Longevity of male and
female was 7.06 ± 0.83 and 5.50 ± 0.51 days, respectively. Entire lifespan
of female and male was 15.90 ± 0.99 and 14.33 ± 0.99 days,
respectively. Sex ratio (male : female) of the parasitoid was 1 : 1.40 in
laboratory reared adults. Morphometry observations of adults revealed
that the females were relatively larger in size than males.
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Keywords
Agricultural Entomology,Study, Study